Method of and machine for performing operations upon shoe parts



May 14, 1935. R. E. DUPLESSlS METHOD OF AND MACHINE FOR PERFORMINGOPERATIONS UPON SHOE PARTS 5 Sheets-Sheet 1 Filed Sept. 8, 1933 y 1935.R. E. DUPLESSIS 2,000,936 METHOD OF AND MACHINE FOR PERFORMINGOPERATIONS UPON SHOE PARTS Filed Sept. 8, 1955 5 Sheets-Sheet 2 mmw 32 vy 4, 1935. R. E. DUPLIESSOIS 2,000,936

METHOD OF AND MACHINE FOR PERFORMING OPERATIONS UPON SHOE PARTS FiledSept. 8, 1953 3-Sheets$heet 3 Q VENTUR Patented .May 14, 1935 UNITED STS P N METHOD OF AND MACHINE FOR PERFORM- ING ()PEBATIONS UPON SHOEVPARTS Rene E. 'Duplessis, Beverly, Mass., assignor to e United ShoeMachinery Corporation; Paterson, i Q 7 N. J'., a corporation of'NewJersey Application September 8,1933, Serial No. 688,644.

21 Claims.

This invention relates to methods of and machines for performingoperations upon shoe parts and-like articles, and is herein describedand illustrated as embodiedin a machine for skiving and buffing boxtoesand counters. It is customary to skive such articles to a. feather edgeand the skiving operation sometimes leaves the surface of the article insuch condition that buffing may be desirable. In; suchcases the bufiinghas hitherto been carriedohtas a. subsequent operation, requiring theuse of a separate machine. I

It is an object of the present invention to provide a method of skivingand buffing a work piece in a single operation. 'In accordance with afeature of the invention, a work piece is pressed into a matrix and thenskived to a-form determined by the matrix, and .While the work piece isstill in the matrix the exposed surface ofthe work piece is buffed.Conveniently and in accordance with a feature of the invention, thematrix with the work piece pressed into it is first moved past a skivingtool and then past a bufling tool .to cause the exposed surface of thework piece to be bufied.

A further object of the invention is to provide a machinefor skiving andbuffing work pieces such as counters and boxptoes. In accordance withthis object, afeature of the invention consists of a machineorganization comprising a feed member, a skiving tool for operating one.work piece as the work piece is advanced by the feed member, and abuffing tool constructedand arranged to. operate upon- ,the; skivedsurface of the work piece during the continued advance of the workpieceby thefeed member. .In the illustrated machine, the skiving meansconsists of a knife andthe bufiingmeans consists of an abrasive coveredroll. In order to determine the form to which the work pieceis to beskived, a matrix is provided which,- in the illustrated machine,consists of;a driven roll having a depression into which the work piecemay be pressed. The shape of the matrix is usually such as to cause theskiving knife tov leave the central portion of the work piece more orless fiat while beveling the edge portions. ,The matrix rollof theillustrated machine not only performs the function ofv a matrix butserves also as ameans for feeding the workpiece past the skiving knifeand past vthe buifing roll. There is a very important advantage in theabove-described pro-. vision for buffing the workpiece while the workpiece is still pressed into the matrix in that it enables the,buffinfoll to operate upon both the (Cl. 12-'6 1)' g v beveled and theunbeveled portions of the ex.-

posed surface of the work piece without increased pressure upon thelocality at which these two portions merge into each'other. .A furtheradvantage resides in the fact that such an arrangement enables theskiving and buffing of the work piece to be carried out in a singleoperation and by a single machine, saving a considerable amount of timein requiring less handling of'the work piece and also saving the spacewhich would beoccupied by anadditional machine.

These and other features of the invention will appear from an inspectionof the accompanying drawings, which illustrate a preferred embodi mer tof the invention, I and from the following' detailed descriptionoftheconstruction and op}- eration of the machine illustrated therein.

In the drawings, 5 a V Fig. l is a view in side elevation of theimproved machine; T p

Fig. 2 is a sectional View in side elevation of the skiving and buffingmembers together with portions of thefeed mechanism; 7 i i r Fig. 3' isa view inside elevati'onof portions of the interior mechanism; and 7Fig. 4 is afragm'entary view'in front elevation (looking down at aslight inclination) or the parts shown in Fig.3.v

The supporting structure of chine consists of a frame III in whichisjourthe illustrated manaled a main shaft 12 :which is driven by anyconvenient source of power. Also journaled in the frame "-HJ is a shaftJ8 upon which ismounted a matrix roll 20 having formed in it a pair ofdepressions 22and 24. In liig. 2 awork'piece W is shown as embeddedin-the depression 24.

The shaft I8 is driven bysuitablegearingfrom the main shaft l2.'

- Secured upon the upper portion of theframe i0 is a magazine (Fig; 1)for a vertical stack of work pieces. The lowermostwork *piece of thestack rests upon a work table 32 (Fig-'2) and it is advanced in timedrelation to' the matrix roll 20 in such a way as to cause it to registerwith one or another. of the matrix depressions 22 or 24. Secured in theupper portion of the frame lllisablock 34 upon theup.

per face of which is mounted a skiving knife 36 having'its cutting edgeextending close tothe undepressed portion of the periphery of thematrix, roll 21!. As the lowermost workpiece-of the stack is advancedinto one of the depressions, it is carried by the rotation of the rollpast the skiving knife 36' and the work piece-is thus s'kived to theform determined by the 'matrix;

In Fig. 2 is shown a work piece W in the act of entering the depression22. The machine as described up to this point is substantially the samein construction, arrangement and mode of operation of' its various partsas the machine described in U. S. Letters Patent No. 969,987, grantedSeptember 13, 1910, upon the application of -J. R. Scott.

For the purpose of assisting the matrix roll 20 in feeding the workpiece, there is provided a plurality of toothed disks 38 (Fig. 2) whichare mounted upon a sleeve 40' secured upon a shaft 42. The shaft 42 isjournaled in the upper portion of the frame IE) and is driven bysuitable gearing from the shaft I8. For pressing the work piece downinto the matrix depressions there are provided a plurality of springfingers 48 .(Fig. 2). The toothed disks 38 are spaced from each other,and the fingers 48 extend into the spaces between the disks. Theconstruction of the present machine, so far as the toothed disks 38 andthe springflngers 4'8 are concerned, is similar to that of the machinedisclosed in U. S. Letters Patent No. 1,173,359, granted February 29,1916, upon the application of E. E. Lane.

The work pieces are fed from the magazine 30 by a mechanism which willnot be illustrated or described here in detail, inasmuch as thismechanism is fully disclosed in U. S. Letters Patent No. 1,260,553,granted March 26, 1918, upon the application of E. E. Lane. Thismechanism consists substantially of a feed slide 49 carrying a thinmember ,(not shown) which engages the lowermost work piece of the stackand advances it to the matrix. This feed slide is reciprocated by alever 50 which in turn isreciprocated by a lever 53 driven by a. cam(not shown) on the main drive shaft I2. The lever 55? is provided withaslot whereby it enters into driving engagement with a pin 52 securedupon the feed slide. A link' 54 serves toraise and lower the lever 50toJeifect engagement and disengagement respectively of the feed slidethrough the driving mechanism. Such raising and lowering of the lever 50is controlled through a treadle 56 subject, however, to a mechanismindicated generally by the, reference character 58 which servesautomatically to insure that the driving connection of the feed slide bemade at such times and under suchconditions as to insure properregistration of the work piece W with the matrix roll-Z0. As abovestated, this mechanism is fully disclosed in Letters Patent No.1,260,553 and no further description of it need be made here. Themachine as so far described operates only to skive the work pieces.

In order to provide for buffing work pieces, there is provided a buffingroll 68 having a sheet of emerycloth 5?, secured upon its periphery.

The-buffing rollBU is mounted upon a shaft 64,

which is journaled in a pair of 1 bearings 55 formed upon the ends of ayoke Bil. The yoke 68 constitutes one arm of a bell crank which isfulorumed upon a pin It carried in the upper end of a lever II. Integralwith the yoke 58 and constituting the other arm of the bell crank is alever 12. Threaded into the lower end of the lever "I2 is a pin I4having a knob 36 formed upon itsouter end. Between the threaded endportion and the knob I6 the pin is is reduced in diameter and leftunthreaded. This unthreaded portion of the pin 'M'passes through acylindrical block I8, the; pin M being freely rotatable relatively to:the block I8 but the block I8 being held between .the enlarged threadedend portion and the knob I6 to prevent relative longitudinal movement ofthe block I8. Extending axially from each end of the block I8 is a pin85. The pins 86 engage a pair of slots 82 respectively which are formedin a pair of lugs 84 formed on the upper portion of the lever II. It isevident that turning of the knob 16 in one direction or the other willmove the lever i2 toward the right or left, as shown in Fig. 1, therebyrotating the bell crank comprising the yoke 58 and the lever I2 aboutthe pin I8 and raising or lowering the buffing roll 5i to effect thedesired adjustment of the buffing roll toward or from the matrix roll20. A clamping bolt 85 extending through the lugs 84 passes through anarcuate slot 88 formed in the lever I2 and, when tightened, serves toclamp the lever I2 mas adjusted position. The lower end of the lever 'IIis fulcrumed upon a pin secured in the lower portion of the frame IE!and coaxial with a shaft I58 shown in Fig. l. Formed in the lever ii isa slot 94 through which passes a bolt 55' which is threaded into theframe I9. Between the head of the bolt 95 and the lever 'II is anelongated washer 58 which, when turned crosswise to the slot 94, servesto hold the lever II in its operating position. When it is desired toreplace an abrasive cover upon bufing roll, the Washer '38 is turned toan angle of degrees enabling it to slip through the slot 3 The lever itmay then be swrmg outwardly to render the buffing roll accessible. Asuitable opening formed in the upper portion of the rear wall of theframe I9 enables the buffing roll tc pass to and from its operatingposition. The bufllng roll 56 is driven by a belt I02 passing around apulley E55 mounted upon the shaft 54 and also around a pulley I55secured upon the shaft 58 which is journaled in the lower portion of theframe it. The outer end of the shaft 88 carries a pulley I i 0 aroundwhich passes a belt H2 which is driven by a pulley secured upon the mainshaft I 2.

The shaft I 58, as above indicated, is substantially concentric with thefulcrum of the lever II, so that movement of the lever iI toward andfrom its operating position will notafife ct the tension of the belt I62.

In order to retain a work piece within one of the matrix depressions 22or 24 after the work piece has passed the skiving knife 35, there areprovided three rolls H5, H8 and I26 respectively.

, These rolls are mounted in substantially tangential relation to theundepressed portion of the periphery of the matrix roll 25. Secured toeach end portion of the knife support 34 is a bearing block I22 withinwhich the ends of the rolls H6, H8 and I20 rotate. These end portionsI24 are reduced in diameter, as indicated in Figs. 2 and 3. Secured uponeach of the rolls H5, H8 and iii] are gears I26. Each of the gears I 25meshes with a gear I23 carried upon the matrix roll shaft I8 so thatth'ethree rolls H6, 'I I8 and i'20,'rotating in a direction opposite to thatof the matrix roll, will assist the latter in feeding the work piecewhile holding the work piece positively in the matrix depression. Theperipheral speed of the rolls H6, H8 and I23 is substantially equal tothat of the matrix roll 25. A sheet metal guard I33 (Figs. 2 and 3) iscurved about the matrix roll 20 and extends from the lower surface ofthe knife 35 almost/to the periphery of the abrading roll 60. This guardis secured to the bearing blocks I22 by screws I32. The guard 139 isslotted to provide clearance for each of the rolls I I6, I I8 and I20.The guard I39 serves to prevent the leading end of the Work piece fromspringing out of thematrix depressionand guides the lead ing end intoengagement with the three feed rolls.

. In order to prevent the work piece from adhering to the abrading roll60 and to keep it in the matrix depression, there is provided a stripper'to the undepressed portion 'of the 'matrix roll 20. Secured upon theroll I46 is a gear I 48 which meshes with the gear I28, thereby drivingthe roll I46 in a direction opposite to that ofthe matrix roll andcausing the roll 146 to assist inthe feedof the work piece. Thedirections of rotation of all of the various rolls respectively areindicated by arrows on Fig. 2. Depending from the cross piece I33 andcurved about the forward lower portion of the abrading roll 60 is asheet metal guard I50which protects the operator from contact with theabrading roll. The lower end of the guard I50 is supported by a rod I52extending between the .side walls of theframe I0. A downwardly inclinedweb I 54 serves asa delivery chute for the work pieces as they leave theroll I46 and the matrix rollZB. a

In the operation of the machine, the work pieces W are fed by theautomatic mechanism from the stack within the magazine 30 being advancedin timed relation to the matrix roll 20 sothat each Work piece registerswith a depression on, the matrix roll; The work pieces are first carriedpast the knife 36 which skives them to a form determined by thedepressions in the matrix roll. 'As the matrix roll continues to rotate,the work pieces are retained within the depressions by the rolls H6, H8and I20, which rolls also assist in the feed of the workpiece. Continuedrotation of the matrix r011 brings the work piece into engagement withthe'bufling roll which finishes the entire exposedsurface or the 'workpiece. Aiterpassing the bufiing roll, the work piece continues past thebeveled edge of the stripper I35 and past the roll I45 whereupon itdropsiout' of the depression in the matrix roll into the chute I54 fromwhich it may fall into'a receptacle.

Having described the invention, what I claim 1. Amethod of makingshoeparts and the like which consists in pressing a work piece into a.

matrix, skiving the work piece to a form determined by the matrix, andbufling the exposed surface of the work piece while'the work piece isstill in the matrix.

2. A method of making shoe parts and the like which consists in pressinga workpiece into a matrix, moving the matrix past a skiving tool tocause the workpiece to be skived. to a 7 form determined by the matrix,and in further moving the matrix with the work piece pressed thereinpast a bufling tool to cause the exposed surface of the work piece to bebufied. I

3. A machine for operating upon shoe parts and like articles comprisinga feedm'embenaskiving tool for operating upon a work piece as the workpiece is advanced by said feed member, and

a bufiing tool constructed and arranged to operateupon the smveesumceoithe work; piece, I r

by. said feed member; v LA machineforfoperating upon shoe parts duringthe continuedadvanoe of the workpiece andlikearticles comprising a. feedroll, a rela- I":

tively stationary skiving'knife positionedto operate upon a workpiecewhich isbeing advanced by work piece during the continued advance of thework piece by saidfeed rol1,and means for holding thework piece againstsaid feed roll.

and like articles, comprising a cutting tool, a

buffing. tool, a matrix, andineans for causing opera-tive engagementfirst between a workpiece in said matrix and said cutting tool andthenbetween the work piece and said bumngtool.

6. A machine for operating upon'shoe parts v and like articles,comprising a knife, abufiing tool, a matrix, and means for moving saidmatrix to cause a work piece in the matrix to come into' then with saidbufiing'tool. g 17. A machine for operating upon shoeparts operativeengagement. first with saidkniie and skiving tool and then to saidbufiing tool. j

8. A machine for operating upon shoe parts and said feed roll, abuffingroll constructed and a-r ranged tooperate upon the skived surface of theA machine for operating upon shoe parts 25: and likea'rticles,comprising. a skiving tool'fa like articles, comprisinga skiving tooLabufiing tool, a matrix'means for causing operative engagement'firstbetween a work piece in said thework piece and said bufling to0l,andmeans for retaining the work piece in the'matrixbetw'een said'skivingand bufiing operations.

9. A machine for operating upon' shoe parts and like articles,comprising a skiving tool, a

binfing tool, a driven matrix roll constructed and. arranged to presenta work piece first to saidskiving tool and then to said-buffing tool,andmeans positioned between said skiving tool and said bufiing toolforretaining the work piecein the matrix. I 10. A machine'for operatingupon. shoe parts and like articles, comprisinga skiving tool, a builingtool, a driven roll-having a matrix depression.

and constructed an d'arranged to present a work piece in said depressionfirst to said skiviiigntool and then to saidbufiingtool, said bufiingtool being driven in a direction to oppose the feedof the, j

1 work piece, and driven means engageable withthe exposed surface oftheworkpiece .in said matrix depression for assisting the matrix roll infeeding the work piecepas't said bufiing roll.

"ll-. A- machinefor operating'upon shoe; parts and like articles,comprising a skiving tool, a buning tool, a driven roll having a matrixdepression and constructed and arranged to present a work piece in saiddepression first to said skiving tool and then to' said bu fing tool,said buffing tool being driven in a direction to oppose thefeed of thework piece,;and'driven means 'engageable and like articles, comprising askiving tool, a bufi ing tool, a drivenroll having a matrix depressionand constructed and arranged to presenta work piece in said depressionfirst to said skiving tool andthen to said bufling tool, and a pluralityof rolls substantially tangential to the undepressed portion of saidmatrix roll for retaining the work piece in said matrix depressionbetween said skiving tool and said buffing tool. 7 r

13. A machine for operating upon shoe parts and like articles,comprising a skiving tool, a buff ing tool, a driven roll having amatrix depression and constructed'and arranged to present a work piecein said depression first to said skiving tool and then to said bufiingtool, a plurality of rolls substantially tangential to the undepressedportion of said matrix roll for retaining the work piece in said matrixdepression between said skiving tool and said bufiing tool, and meansfor driving said retaining rolls to assist said matrix roll in feedingthe work piece.

14. A machine for operating upon shoe parts and like articles,comprising a skiving tool, a bufiing tool, a driven roll having a matrixdepression and constructed and arranged to present a work piece in saiddepression first to said skiving tool and then to said bufiing tool, anda guide member close to said matrix roll and having a work guidingsurface curved about said matrix roll between said skiving tool and saidbufiing tool to retain the'work'piece in said matrix depression.

15. A machine for operating upon shoe parts and like articles,comprising a skiving tool, a bulfing tool, a driven roll having a matrixdepression and constructed and arranged to present a work piece in saiddepression first to said skiving tool and then to said bufiing tool, aplurality of'rolls substantially tangential to the undepressed portionof, said matrix roll for retaining the work piece in said matrixdepression between said skiving tool and said bufiing tool, and a guidemember close to said matrix roll for assisting said retaining rolls inretaining the work piece in the matrix depression, said guide memberhaving a work guiding surface which is curved about said matrix rollbetween said skiving tool and said bufiing tool and which is recessed toaccommodate said retaining rolls. a

16. A machine for operating upon shoe parts and like articles,comprising a skiving tool, a-

buifing tool, a matrix, means for causing operative engagement firstbetween a work piece in said matrix and then between the work piece andsaid bufiing tool, and means for preventing the work piece from adheringto said bufling tool.

1'7. A machine for operating upon shoe parts and like articles,comprising a skiving tool, a buffing tool, a driven roll having a matrixdepression and constructed and arranged to present a work piece in saiddepression first to said skiving tool and. then tosaid buffing tool, andmeans engageable with the leading endof the work piece as the work piecepasses said bufiing tool to strip the work piece from the buffing tool.

18. A machine for operating upon shoe parts and like articles,comprising a skiving tool, a bufiing tool, ,a driven roll havinga matrixdepression and constructed and arranged to present a work piece in saiddepression first to said skiving tool and then to said bufiing tool,said bufiing tool being driven in a direction to oppose the feed of thework piece, and a feed roll positioned beyond said buffing tool andengageable with the exposed surface of the work piece in the matrixdepression, said feed roll being driven in a direction to assist thematrix roll in feeding the work piece past the bufiing tool.

19. A machine for operating upon shoe parts and like articles,comprising a rotary bufiing tool, a driven roll constructed and arrangedto present a Work piece to said bufiing tool, a carrier for said buffingtool, a pivoted support for said carrier to enable said buifing tool tobe moved away from said roll when it is desired to replace the abrasiveelement of said bufiing tool, a driven shaft substantially coaxial withsaid pivotal support, and a driving connection between said driven shaftand said bufiing tool.

20. A machine for operating upon shoe parts and like articles,comprising a. driven rotary buffing tool, means for presenting a workpiece to said buffing tool, a carrier for said buffing tool, means forsupporting said carrier for movement of said bulfing tool from an,operating position relatively close to said work presenting means to aposition relatively remote from said work presenting means when it isdesired to replace the abrasive element of said bufling tooLand asupport for said buffing tool adjustably secured upon said carrier toenable the buffing roll, when in operating position, to be, adjustedtoward and from said work presenting means.

21. A machine for operating upon'shoe parts and like articles,comprising a driven rotary buffing tool, means for presenting a workpiece to said buffing tool, a carrier for said buffing tool, a pivotalsupport for said carrier to enable said bufilng tool to be moved from anoperating position relatively close to said work presenting means to aposition relatively remote from said work presenting means when it isdesired to replace the abrasive element of said buffing tool, a supportfor said bufiing tool pivotally mounted upon said carrier, and means foradjusting said buffing roll support relatively to said carrier'to varythe distance between said bufling tool and said work presenting meanswhen the carrier is in operating position. q

' i RENE E. DUPLESSIS.

